Why does AutoDesk Inventor save mirrored components in an assembly as a seperate file?!

I am creating a complex assembly using various seperate components. In order not to have to bring in each duplicate component in seperately every time, I am mirroring the parts. This also helps me avoid having to mate each part in order to get it in the right position (due to complex shapes and planes, mating is difficult. But my problem is, that with each component I mirror, it saves the component as a seperate file, even though it is the same component but just rotated round a plane. I cannot always use the pattern feature to rotate is around an axis either. So my question is, can I stop Inventor saving my mirrored parts as serpate files?
3 Answers

there are two way to mirror parts in asembly.. Reuse and Recreate. If you choose reuse , inventor doesn't create a new part.. After you choose the parts (that will be mirrored) you must click the yellow icon.. then click the parts..
Answered with a tutorial: https://grabcad.com/tutorials/why-does-autodesk-inventor-save-mirrored-components-in-an-assembly-as-a-seperate-file

I am not an expert on the matter and there might be a way to stop the seperation, but I believe that when the parts are mirrored, they are not the same as the true copies and therefore become their own parts, different in appearance and code from the original copies they were created from.
-Qrules

If you need only one mirrored iam file. First use simplify command and change iam to one multibody ipt file. Then mirror simplified ipt. In this case you don't need lots of mir_files. Example, when you need to make kitchen and there is two cabinet one left hand door and one right hand. Then you need one lefthand iam with all the parts and 2d drawings. And you need one mirrored simplified ipt file for overall kitchen drawings. Usualy you don't need to make 2d drawings for mirrored parts for production, only use text comment on your 2d drawings "left is on drawing, and right is mirror image"